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TIL that the word “dude” is actually a Scottish word, from ‘duddies’

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via reddit.com

GOwE TIL that there is a 17-percent increase in traffic fatalities on the Monday after clocks spring forward
QJBa6 TIL that the science of bite-mark comparisons, ballistic comparisons, fingerprint matching, blood-spatter analysis, arson investigation and other common forensic techniques have been tainted by systematic error, cognitive bias (tunnel vision) and little or no research or data to support it.
NvwQ TIL that Weird Al’s parents both died on the same day of carbon monoxide poisoning. Only hours later, he performed a concert and started by saying “since my music had helped many of my fans through tough times, maybe it would work for me as well.”
JYEvm TIL They found that the bats' closest relatives aren't tree shrews, flying lemurs, or even mice (as has been proposed); instead, they formed their own group early on that may share a common ancestor with the mammals that eventually evolved into horses, pangolins, whales, and dogs.
6E5PX TIL that flatworms reproduce by "penis fencing", where each worm attempts to stab the other with their penis. They are hermaphrodites, so the loser is impregnated.